Generally they way one treats a penny (the lowest denomination of coin for those outside the U.S.) is often overlooked or disregarded. The female in question identifies herself with said coin, perhaps in reference to being passed over by others. One may also infer that she feels justice is served, for anyone that would pass up a precious gem such as herself must have their life in a state of disarray.

Well, speaking as someone who works in the nightlife industry, if you have your own birthday party as just your average person at a nightclub, there's generally a charge at the door for the guys. The birthday guy/girl and the girls get in for free.